Nut-lock



(No Model.)

T. T. OVERSHINER.

' NUT LOCK.

- No. 247,101. Patented Sept. 13,1881.

Wfizsize Mfr/If N, PETERS, Phola-Uthogriphn. Walhi C.

UNITED STATES PATENT OFFICE.

TIMOTHY T. OVERSHINER, OF GHILLIOOTHE, OHIO, ASSIGNOR OF ONE-HALF TO P. S. LEWIS, OF MASON COUNTY, WEST VIRGINIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 247,101, dated September 13, 1881. Application filed July 8, 1881. (No model.)

To all whom it may concern:

Beitknown tl1atI,TIMOTHY T.()VERsHINER-, of Ohillicothe, in the county of Ross and State of Ohio, have invented certain new and useful 5 Improvementsin Nut-Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to I0 the accompanying drawings, which form part of this specification.

My invention relates to an improvement in nut-locks; and it consists in making in the inner surface of the nut, from each edge, a

tapering recess, into one or more of which recesses is slipped a small steel sharp pointed lockingdevice, which, when an attempt is made to turn the nut hack ward, catches in or against the surface of the piece against which the nut bears, and thus locks the nut in place, as will be more fully described hereinafter.

The object of my invention is to devise a cheap, simple, and efficient lock for nuts, which will prevent them from becoming loose, and

which can be readily and easily applied and removed.

Figure 1 is a vertical section of my invention, taken through the nut and the locking device. Fig. 2 is a perspective of the nut, taken 0 from the inner side. Fig. 3 is a perspective of the locking device by itself.

A represents an ordinary screw-threaded bolt, and B a common nut applied thereto. Made in the surface of this nut, on its inner side,

5 are a number of tapering recesses, O, which run parallel with one of the sides of the nut, and which are deepest at their outer ends. There may be any desired number of these recesses made, but one from each side will be found to answer every purpose. After the not has been screwed tightly into position the looking device F, which is constructed as shown,

is slipped into any desired one of the recesses and forced-sufficiently tightly in place by being struck by some instrument to prevent it from readilycomingout. Thiscauses the sharp point of the device to catch in the surface against which the nut bears, and whenever it is attempted to turn the nut backward the incline formed on the recess causes the locking device to sink deeper into the surface, and thus effectually prevents the not from being turned around.

When it is desired to unlock the nut it is only necessary to turn it a very little forward, which 5 5 makes room enough in the recess in which the lockin g device is placed for it to be raised slightly outward, and thus loosen itfrom the surface against which it is locked.

The great advantage of a very small locking 6o device like the one here shown consists in the fact that it is hidden from the eye, so as not to mar the appearance of the work. It can be applied to nuts of all kinds where but a small piece has been cut out from its under side by any suitable tool, and is so cheap as to cost almost nothing.

Having thus described my claim- In a nut-lock, the combination of a nut hav- 7o ing one or more inclined recesses made in its inner side, which recesses are deepest at their outer ends, with a lockiu g device, F, which has a sharp edge form ed on its inner surface, whereby when the nut is turned backward the sharp edge is forced into the surface against which the nut bears, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

TIMOTHY TAYLOR OVERSHIN'ER.

invention, I

Witnesses A. B. HowsoN, H. M. WARE. 

